I want to understand how focusing works in Manual mode in my D90. I switched off the autofocus buttons in the Kit lens and the camera body. I have changed to the manual mode. Now, when I try to focus on any specific object, I do not see any specific focus point being highlighted when I press the shutter button halfway. All the focus points on the view finders lights up in red and camera clicks immediately after pressing the shutter button fully.
I want to know why I am not able to focus on any specific object. For example, if I want to focus on the nearer object, so that the background is little blurred, then I dont seem to be able to do this. (I want to achive the 'Bokeh' effect)